Looking at a cell under a microscope, you note that it is a prokaryote. How do you know?(a)The cell lacks cytoplasm.
(b)The cell lacks a cell membrane.
(c)The cell lacks a nucleus.
(d)The cell lacks genetic material.
Can someone explain this one for me ?

Answers

Answer 1

Answer: You would know that a cell under microscope is prokaryote because it lacks nucleus cells. Prokaryote is a single celled organism. It’s cell structure is composed of flagellum, cell membrane, cell wall, cytoplasm, ribosome, nucleoid, and glycocalyx. Flagellum’s function is to aid cellular locomotion but is only for selected types of prokaryotes. Cell wall covers the outer part to protect the bacteria cells. Nucleid is the area that contains the DNA of the bacteria. Cell membrane regulates the flow of the substances in and out of the cell. Cytoplasm contains salts and other organic molecules. Ribosomes is responsible of protein production.

Answer 2

Answer:

Answer:

1.C

2.A

3.D

4.D

5.B

6.A

7.B

8.A

9.B

10.A

Explanation:

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which statement best describes the difference in species diversity between an ecosystem beginning the process of primary succession and one beginning the process of secondary succession?

Answers

Answer | Explanation: The difference in species diversity between an ecosystem undergoing primary succession and one undergoing secondary succession can be described as follows:

1. Primary Succession: In primary succession, an ecosystem develops in an area that was previously devoid of life, such as a newly formed volcanic island or a bare rock surface. As the ecosystem starts from scratch, the process is slow, and the initial species colonizing the area are usually hardy pioneer species, such as lichens and mosses. These species have adaptations that allow them to survive in harsh and barren conditions. Over time, as the ecosystem progresses through different stages, more complex and diverse species gradually colonize the area. Therefore, species diversity is initially low in ecosystems undergoing primary succession.

2. Secondary Succession: Secondary succession occurs in an ecosystem that has been disturbed or disrupted, but where the soil and some remnants of the previous community remain. Examples of disturbances that lead to secondary succession include forest fires, clear-cutting, or abandoned agricultural land. In secondary succession, the recovery process is faster compared to primary succession because there is already a foundation of soil and existing species. As the ecosystem regenerates, a variety of species, including both early-successional and late-successional species, can quickly recolonize the area. This leads to a higher initial species diversity in ecosystems undergoing secondary succession compared to primary succession.

In summary, the main difference in species diversity between an ecosystem in primary succession and one in secondary succession is that primary succession starts with low species diversity and gradually increases over time, while secondary succession begins with higher species diversity due to the presence of soil and remnants of the previous community.

The scarlet cup fungus (Sarcoscypha coccinea) obtains its nutrition from decaying wood by releasing digestive enzymes into the wood and absorbing the digested products.I. Autotroph
II. Heterotroph
III. Saprotroph
A. III only
B. II and III only
C. I and III only
D. I, II and III

Answers

II and III only. The fungus is a heterotroph, since it's not making it's own food, but it's also a Saprotroph (since it externally digests dead organic materials; saprotrophs are a special subset of heterotrophs).

a scientist kept 500 grams of a radioactive material in a container. after 60 minutes, he observed that 62.5 grams of the radioactive material was left in the container. based on the observation, which of these is the most likely inference drawn by the scientist?

Answers

After the 1st half-life 250 g of the radioactive material will be left.
After the 2nd half-life 125 g of the radioactive material will be left.
After the 3rd half-life 62.5 g of the radioactive material will be left.

Therefore after 60 minutes, 3 half lives would have occurred.

Therefore the half-life = 60 / 3 = 20 minutes when 250 grams of the original material would have remained radioactive.

Therefore the answer is A) About 250 gram of the material decayed in 20 minutes.

Answer:

Explanation:

2 PointsWhat will the stopping distance be for a 1,000-kg car if-2,000 N of force are
applied when the car is traveling 10 m/s?
A. 50,000 m
B. 10 m
C. 25 m
D. 250 m
SUV

Answers

Answer:

I think is B

Explanation:

the answer will be B i hope this helps

Which of the following types of algae shows a distinct alternation of generations? a. Chlorophytes
b. Phaeophytes
c. Chrysophytes

Answers

C) Chrysophytes is the type of algae that shows a distinct alternation of generations.

The types of algae that shows a distinct alternation of generations is : C. Chrysophytes
Chrysophytes can only survive in an environment that is low in calcium , which is they're really common to be found in Freshwater

Hope this helps

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